MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which device is used to store the energy during load equalization? |
| A. | Flywheel |
| B. | Capacitor |
| C. | Inductor |
| D. | Resistor |
| Answer» B. Capacitor | |
| 2. |
What is Load Equalisation? |
| A. | Process of smoothing the fluctuating load |
| B. | Process of removing the load |
| C. | Process of changing the voltage level |
| D. | Process of changing the speed |
| Answer» B. Process of removing the load | |
| 3. |
Full form of VFD is _____________ |
| A. | Variable frequency drive |
| B. | Variable force drive |
| C. | Value frequency drive |
| D. | Variable force diverter |
| Answer» B. Variable force drive | |
| 4. |
Calculate the heat absorbed by a 20 Ω resistor when 40 V is applied across it. |
| A. | 120 W |
| B. | 100 W |
| C. | 80 W |
| D. | 110 W |
| Answer» D. 110 W | |
| 5. |
Calculate the heating time constant of the machine if the thermal capacity (c) of the machine is 16 watts/℃ and heat dissipation constant value (D) is 4 watts/℃. |
| A. | 6 sec |
| B. | 7 sec |
| C. | of the machine is 16 watts/℃ and heat dissipation constant value (D) is 4 watts/℃.a) 6 secb) 7 secc) 4 sec |
| D. | 9 sec |
| Answer» D. 9 sec | |
| 6. |
Calculate the compensator rating required for sin(Φ)=.8. |
| A. | 0.9 P.U |
| B. | 0.8 P.U |
| C. | 0.7 P.U |
| D. | 0.2 P.U |
| Answer» C. 0.7 P.U | |
| 7. |
The Speed control by variation of field flux results in _____________ |
| A. | Constant torque drive |
| B. | zero speed |
| C. | Variable torque drive |
| D. | Variable power drive |
| Answer» D. Variable power drive | |
| 8. |
Which type of force phenomenon is used in Sugar mills? |
| A. | Centripetal force |
| B. | Centrifugal force |
| C. | Electrostatic force |
| D. | Nuclear forces |
| Answer» C. Electrostatic force | |
| 9. |
Calculate the work done in stretching the wire of length=2 m and the values of stress and strain are 16 N/m2 and 24. |
| A. | 1566 J |
| B. | 1644 J |
| C. | 1522 J |
| D. | 1536 J |
| Answer» E. | |
| 10. |
Which type of motor is used for milling and grinding operations? |
| A. | SCIM |
| B. | WRIM |
| C. | Split phase |
| D. | Reluctance motor |
| Answer» B. WRIM | |
| 11. |
Which of the following are the types of Longitudinal stress? |
| A. | Tensile stress, Compressive stress |
| B. | Tensile stress, Volume stress |
| C. | Tensile stress, Shear stress |
| D. | Tensile stress, Lateral stress |
| Answer» B. Tensile stress, Volume stress | |
| 12. |
Capacitor start capacitor run single-phase Induction motor is used in ceiling fan. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Electric motor and control system are the basic elements of the electric drive. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Calculate the moment of inertia of the flywheel of mass 45 kg and radius of 2 m. |
| A. | 185 kg-m2 |
| B. | 180 kg-m2 |
| C. | 175 kg-m2 |
| D. | 170 kg-m2 |
| Answer» C. 175 kg-m2 | |